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# Time-scale support kernels.
#
# Stores SPICE-compatible LSK text kernels (`naifNNNN.tls`) for UTC-TAI leap
# second conversion, plus future ETZ/EOP datasets.
= 1
= "time-leap-seconds"
= "time-scale"
= "NAIF Leap Second Kernel (LSK)"
= "upstream"
= "naif0012"
= "2026-05-28T00:00:00Z"
= "UTC/TAI"
= "n/a"
= "n/a"
= "seconds"
= 2441317.5
= 2459580.5
= "BIPM-issued leap seconds"
= """
naif0012.tls covers all leap seconds through December 2016 (37 s cumulative).
Fetch the latest kernel from the NAIF URL below when a new leap second is
announced; update the [[files]] entry with the new sha256 and bytes, and
replace the raw file.
IERS Earth Orientation Parameters and ΔT live in the sibling sub-dataset
`time/eop/` (see `time/eop/manifest.toml`); those raw files are fetched at
runtime by `siderust-archive`'s `time`/`fetch` support rather than committed.
"""
[[]]
= "leap-seconds/raw/naif0012.tls"
= "naif-lsk"
= "678e32bdb5a744117a467cd9601cd6b373f0e9bc9bbde1371d5eee39600a039b"
= 5257
= "https://naif.jpl.nasa.gov/pub/naif/generic_kernels/lsk/naif0012.tls"
[[]]
= "NAIF SPICE leap-second kernel collection."
= "https://naif.jpl.nasa.gov/pub/naif/generic_kernels/lsk/"